chapter 4.2 naming compounds. naming ionic compounds before you name it, you have to know when you...
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Chapter 4.2Naming Compounds
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Naming Ionic Compounds
Before you name it, you have to know when you see it! What is an Ionic Compound? How to identify an Ionic Compound?
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Naming Ionic Compounds
What is an Ionic Compound?How to identify an Ionic Compound? Metal and non-metal bonded togetherPositive and negative ionsIONs and IONic compound
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Ionic or Covalent Compound?
1. NaCl 2. CH4 3. S5Br18 4. MgO 5. NO
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Naming Ionic Compounds (copy)
Metal ion = name stays the sameNon-metal ion = change the ending to "-ide" Example: NaCl = Sodium ChlorideNa = SodiumCl = Chlorine >>> change ending to chloride
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Naming Ionic Compounds
Examples: 1. Li3N 2. CaO 3. ZnS 4. AlP
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Naming Ionic Compounds
Examples: 1. Li3N = Lithium Nitride 2. CaO = Calcium Oxide 3. ZnS = Zinc Sulphide 4. AlP = Aluminum Phosphide
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Chemical Names to Formulas
Write the chemical formula of Potassium Iodide. Find the charge of each ionPotassium ion = K+1Iodine ion = I-1 The ratio is 1 to 1, so the formula is KI
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Chemical Names to FormulasWrite the chemical formula of Potassium Oxide. Find the charge of each ionPotassium ion = K+1
Oxygen ion = O-2
The ratio is 1 to 2, so there must be 2 K for each O = K2OOR cross the charges down
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Chemical Names to Formulas
Write the chemical formula for Aluminum Nitride. Find the charge of each ion.Aluminum ion = Al+3 Nitrogen ion = N-3
Ratio is 3 to 3, or Al3N3 Reduce like a fraction.AlN
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Practice Problems
TextbookPage 187 - formula to namesPage 188 - names to formula
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Multivalent Metal Ionic Compounds
Multivalent- Multi means more than one- Valent refers to the valence electrons So multivalent metals are metals with more than one charge. Example: Copper, Cu (#29)It can be Cu+1 or Cu +2 . Need to know which one!
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Multivalent Metal Ionic Compounds
Write the chemical formula for: 1. Copper (I) fluoride 2. Copper (II) fluoride 3. Copper (II) nitride 4. Copper (II) oxide
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Multivalent Metal Ionic Compounds
Write the chemical formula for: 1. Copper (I) fluoride = CuF 2. Copper (II) fluoride = CuF2 3. Copper (II) nitride = Cu3N2 4. Copper (II) oxide = CuO
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Multivalent Metal Ionic Compounds
Use brackets ( ) and Roman numerals (I, II, III, IV, V, VI, ...)in the chemical name. Examples:Write the chemical name of:1. CuF2. CuCl23. PbO4. PbO2
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Multivalent Metal Ionic Compounds
Use brackets ( ) and Roman numerals (I, II, III, IV, V, VI, ...)in the chemical name. Examples:Write the chemical name of:1. CuF = Copper (I) Fluoride2. CuCl2 = Copper (II) Chloride3. PbO = Lead (II) Oxide4. PbO2 = Lead (IV) Oxide
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Polyatomic Ions
Poly = manyatomic = atomsPolyatomic Ions = ions with many different atoms. They stick together, treat them as one thing.Look in the table for the name and formula. Example: Sodium Nitrate = NaNO3 Sodium ion = Na+ Nitrate ion = NO3-
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Polyatomic Ions
Use brackets to show how many polyatomic ions. Example: Zinc HydroxideZinc ion = Zn+2 Hydroxide ion = OH-1
Zn(OH)2
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Polyatomic Ions
ExamplesWrite the name of:1. LiCH3COO2. Mg3(PO3)2
3. CrSO4
Write the formula of:4. Calcium Perchlorate5. Lead (IV) Chromate6. Ammonium Sulfite
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Polyatomic Ions
ExamplesWrite the name of:1. LiCH3COO = Lithium Acetate2. Mg3(PO3)2 = Magnesium Phosphite3. CrSO4 = Chromium (II) SulfateWrite the formula of:4. Calcium Perchlorate = Ca(ClO4)2 5. Lead (IV) Chromate = Pb(CrO4)2 6. Ammonium Sulfite = (NH4)2SO3
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Polyatomic Ions
Practice ProblemsTextbookPage 193
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Naming Covalent Compounds
Check that it IS a covalent compound first!Two non-metals Recall: Ionic or Covalent Compound?1. NaCl2. CH4 3. S5Br18 4. MgO5. NO
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Naming Covalent Compounds
Use a prefix to show how many of each element First element - name stays the same. Only add a prefix if there is more than one. Second element - change the ending to "-ide" Example: CO2 = Carbon dioxide
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Naming Covalent Compounds
Prefixes1 mono2 di3 tri4 tetra5 penta6 hexa7 hepta8 octa9 nona 10 deca
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Naming Covalent Compounds
ExamplesWrite the name of:1. P2Br3
2. SO4
3. F5O10 Write the formula of:1. dicarbon trinitride2. hexaoxygen heptaiodide3. octabromine monohydride
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Naming Covalent Compounds
Write the name of:1. P2Br3 = diphosphorous tribromide2. SO4 = sulfur tetraoxide3. F5O10 = pentafluorine decaoxideWrite the formula of:1. dicarbon trinitride = C2N3 2. hexaoxygen heptaiodide = O6I7
3. octabromine monohydride = Br8H
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Naming Covalent Compounds
Practice ProblemsTextbook Pg 195
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Diatomic Elements
H2 = hydrogenN2 = nitrogenO2 = oxygenF2 = fluorineCl2 = chlorineBr2 = bromineI2 = iodine
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Common Mistakes
Be careful:Sulfide = S-2 Sulfate = SO4
-2 Sulfite = SO3-2
Sulfur tetraoxide = SO4 Sulfur trioxide = SO3 Nitride = N-3 Nitrate = NO3
-2 Nitrite = NO2-1
Nitrogen dioxide = NO2 Nitrogen trioxide = NO3
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Naming Everything
Ionic, Covalent, Multivalent, Polyatomic will all be mixed together. You need to tell them apart to name them. Practice ProblemsTextbook Page 197, 201